Air conditioner



May 16, 1939. J. E. LONG 2,158,294

AIR CONDITIONER Original Filed Aug. 24, 1936 imm- I INVENTOR. foH/v f. Lo/va BY W ATTORNEY.

Patented May 16, 1939 PATENT OFFICE AIR CONDITIONER John E. Long, Edgewater, Cola, aslignor of onethird to William H. Robinson, Sn, and onethird to Paul E. Haskin, both of Amda, Colo.

Application August 24, 1938, Serial No. 97.819

' Renewed October-'4, 1938 6 Claims.

This invention relates to anair conditioner and washer for hot air heating plants, and has for its principal object the provision of a washer through which the water will be automatically circulated by the heat of the furnace so as to eliminate all pumps, motors and other operating parts.

Other objects and advantages reside in the detail construction of the invention, which is designed for simplicity, economy, and efiiciency.

These will become more apparent from the following description.

In the following detailed description of the invention reference is had to the accompanying 1 drawing which forms a part hereof. Like numerals refer to like parts in all views of the drawing and throughout the description.

In the drawing: Fig. 1 is a side elevation of a warm air heating plant, illustrating the invention embodied there- Fig. 2 is an enlarged sectional view through the cold air supply duct illustrating the invention in place therein.

In the drawing the various parts of a typical hot air heating plant is indicated by numeral as follows: furnace jacket i0, firepot ii, warm air distributing pipes i2, cold air duct ii.

The invention is applied to the plant by placing a conditioning section It in the cold air duct i3. A filter medium [5 extends completely across the opening of the cold air duct at the section it. The filter may be of any desired type. The most eillcient type which has been thus far used is a pad of glass fibers held in place in a suitable frame l6.

At the top of the filter the frame I 6 is indented and perforated, as shown at H, to distribute water over the full area of the filter l5. Water is supplied to this indented portion of the frame from an overflow pipe I! in an upper water reservoir IS.

The water from the filter fiows into a lower water reservoir 20. A bailie plate 2| extends downwardly into the lower reservoir to prevent the air from by-passing below the filter.

The water is constantly circulated from the lower reservoir 20 to the upper reservoir I! through a pipe coil 22 which surrounds the tirepot ll of the furnace. A warm'water pipe 23 leads from the pipe coil 22 through a gooseneck 24 which extends below the surface of the water in the upper reservoir.

. In operation, the water is delivered to the upper to reservoir in spurts. This is probably due to the fact that part of the water in the coil 22 approaches the boiling point and creates a vapor pressure. This pressure cannot act back through the check valve 52, and acts to push the remaining water from the-coil and the pipe 23 into the 5 reservoir i9, thus emptying the coil. This allows the weight of the water in the lower reservoir to push the check valve open and flow into the hot coil. As soon as it strikes the heated. coil, it vaporizes and fiows to the upper reservoir as a '10 combination of water vapor and steam. The steam is condensed in the water of the upper reservoir and the operation is constantly repeated as long as the fire is burning, the water being delivered in short spurt-like explosions. 15

While a specific form of the improvement has been described and illustrated herein, it is desired to be understood that the same may be varied, within the scope of the appended claims, without departing from the spirit of the invention. an Having thus described the invention, what is claimed and desired secured by Letters Patent is:

1. An air washing device for hot air furnaces comprising: a vertically positioned filter medium;

' a supply reservoir at the top of said medium; a 5

receiving reservoir at the bottom of said medium; and a pipe coil-in said furnace in circuit between said lower and upper r'servoirs so as to provide a thermosyphonic circulation of water therebetween. 30

2. An air washing device for hot air furnaces comprising: a vertically positioned filter medium;

a supply reservoir at the top of said medium; a receiving reservoir at the bottom of said medium;

a pipe coil adjacent the fire pot of said furnace 35 in circuit between said lower and upper reservoirs so as to provide a thermosyphonic circulation of water therebetween; and a check valve for preveiirting return of the water to said lower reservo 3. An air washing device for hot air furnaces comprising: a vertically positioned filter medium; a supply reservoir at the top of said medium; a receiving reservoir at the bottom of said medium; a pipe coil heated by said furnace in circuit 45 between said lower and upper reservoirs so as to provide a thermosyphonic circulation of water therebetween; a check valve for preventing return of the water to said lower reservoir; and an overflow pipe for conducting-the water from said 5 upper reservoir to said filter medium so as to maintain the water in said upper reservoir at a predetermined level.

4. An air washing device for hot air furnaces comprising: a vertically positioned filter medium; 5

a supply reservoir at the topo! said medium; a receiving reservoir at the bottom of said medium; a pipe coil in said furnace in circuit between said lower and upper reservoirs so as to provide a thermosyphonic circulation of water therebetween, a check valve for preventing return of the water to said lower reservoir; an overflow pipe for conducting the water from said upper reservoir -to said filter medium so as to maintain the water in said upper reservoir at a predetermined level; and a supply pipe from said coil to said upper reservoir, said pipe being turned downwardly to a point below the liquid level in said upper reservoir.

5. An air washing device for a hot air furnace comprising: a vertically positioned filter medium: a supply reservoir at the top of said medium; a receiving reservoir at the bottom of said medium; a pipe communicating between said lower and upper reservoirs and passing into the heated zone of said furnace so as to provide a thermosyphonic circulation of water therebetween; a check valve in said pipe for preventing return of extending across the top of said screen; a receiving water reservoir extending across the bottom of said screen; a heating coil in said furnace; a

pipe extending from said receiving reservoir to said coil, thence to said upper reservoir, said receiving reservoir being positioned at a height which will allow water to flow therefrom by gravity through said pipe into said coil; a check valve in said pipe between said receiving reservoir and said furnace so that when the water in said coil is vaporized it can not flow back into said receiving reservoir, but must force vapor into said upper reservoir.

JOHN E. LONG. 

